i want to bring in newark mayor, corey booker. and christiane amanpour. and psychologist dr. deepak chopra and tom ridge. from washington and former homeland security secretary. corey booker, let me start with you. it is heart-breaking. it's agonizing. you can't say anything to make it better. what i find fascinating about him is his incredible dignity. the way he was prepared to offer comfort and sympathy to the family of the man who had shot his child and he went on to talk about gun control and said that he didn't want wide-ranging gun control to come as a result of this, but he didn't understand why this shooter's mother would ever want to have the kind of assault weapon that was used in her home to defend herself. he raised a number of issues about that which we'll see more of tomorrow. but what do you say to other families in america that can't send them to school now, to movie theaters? there is almost nowhere left now that's sacred for americans to be safe because of gun violence. what is the answer? >> well, first of all, this is not as rare as people might think. th